There was a small time frame, i can't recall exactly when, sometime when i was 14y.o where i suddenly lost my drive to pursue my dreams. i also got somewhat depressed and became extremely lazy. what are the possible factors that have caused this?

Please see a Clinical Psychologist with expertise in multiple types of psychotherapy who can help you understand what triggered your depression and what you can do to help yourself.

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may still be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water.